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Abstract

Our objectives were to determine the effects of the administration of recombinant bovine somatotropin (bST) at the initiation of a fixed-time AI (TAI) protocol on concentrations of plasma IGF-1, follicle diameter, embryo/fetal size, and pregnancy rates in replacement beef heifers. Four hundred and...

Author(s)
Oosthuizen, N.; Fontes, P. L. P.; Henry, D. D.; Ciriaco, F. M.; Sanford, C. D.; Canal, L. B.; Moraes, G. V. de; DiLorenzo, N.; Currin, J. F.; Clark, S.; Whittier, W. D.; Mercadante, V. R. G.; Lamb, G. C.
Publisher
Oxford University Press, Cary, USA
Citation
Journal of Animal Science, 2018, 96, 5, pp 1894-1902
Abstract

To determine the effects of estrus synchronization (ES) and fixed-time artificial insemination (TAI) on calving distribution in Bos indicus influenced heifers, 751 Bos taurus × Bos indicus beef heifers were enrolled in a completely randomized design at 2 locations from January to May of 2016....

Author(s)
Oosthuizen, N.; Fontes, P. L. P.; Sanford, C. D.; Ciriaco, F. M.; Henry, D. D.; Canal, L. B.; DiLorenzo, N.; Lamb, G. C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 106, pp 210-213